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Destroyer #174

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PooyaH

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hmm I think it should a ketal also! I don't see any hydrogens attached to that carbon!
 

klutzy1987

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Choice B is an acetal R-O-R-O-R. That is an acetal whats the question???
 

ramin123

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I do not understand klutz? I thought acetal is a carbon connected to -OR, -OR, -H, -R. The answer contains two -OR and two -R --- which should be a ketal. right??
 

mistero

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Sorry, for not explaining further.
The only difference is how it is created. A ketal comes from a ketone and an acetal usually comes from an aldehyde. The functional group itself is the same.
 

doc3232

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It doesn't matter anymore ketal and semiketal are old terminology.
IUPAC officially tossed them, so DAT probably won't use them :)
 

ramin123

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I understand what you are saying but the answer shows a molecule that was originally a ketone. So, if I were given this question again-- would it be correct if i chose the ketal-- if there were no acetals?
 

doc3232

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I understand what you are saying but the answer shows a molecule that was originally a ketone. So, if I were given this question again-- would it be correct if i chose the ketal-- if there were no acetals?

I guess.
ketal= R-C(OR)2- R
 
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